Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * IPv6 over IPv4 tunnel device - Simple Internet Transition (SIT) |
| 3 | * Linux INET6 implementation |
| 4 | * |
| 5 | * Authors: |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 6 | * Pedro Roque <roque@di.fc.ul.pt> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> |
| 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or |
| 10 | * modify it under the terms of the GNU General Public License |
| 11 | * as published by the Free Software Foundation; either version |
| 12 | * 2 of the License, or (at your option) any later version. |
| 13 | * |
| 14 | * Changes: |
| 15 | * Roger Venning <r.venning@telstra.com>: 6to4 support |
| 16 | * Nate Thompson <nate@thebog.net>: 6to4 support |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 17 | * Fred Templin <fred.l.templin@boeing.com>: isatap support |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | */ |
| 19 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 20 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/module.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 23 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/errno.h> |
| 25 | #include <linux/types.h> |
| 26 | #include <linux/socket.h> |
| 27 | #include <linux/sockios.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/net.h> |
| 29 | #include <linux/in6.h> |
| 30 | #include <linux/netdevice.h> |
| 31 | #include <linux/if_arp.h> |
| 32 | #include <linux/icmp.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 33 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <asm/uaccess.h> |
| 35 | #include <linux/init.h> |
| 36 | #include <linux/netfilter_ipv4.h> |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 37 | #include <linux/if_ether.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #include <net/sock.h> |
| 40 | #include <net/snmp.h> |
| 41 | |
| 42 | #include <net/ipv6.h> |
| 43 | #include <net/protocol.h> |
| 44 | #include <net/transp_v6.h> |
| 45 | #include <net/ip6_fib.h> |
| 46 | #include <net/ip6_route.h> |
| 47 | #include <net/ndisc.h> |
| 48 | #include <net/addrconf.h> |
| 49 | #include <net/ip.h> |
| 50 | #include <net/udp.h> |
| 51 | #include <net/icmp.h> |
Pravin B Shelar | c544193 | 2013-03-25 14:49:35 +0000 | [diff] [blame] | 52 | #include <net/ip_tunnels.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <net/inet_ecn.h> |
| 54 | #include <net/xfrm.h> |
| 55 | #include <net/dsfield.h> |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 56 | #include <net/net_namespace.h> |
| 57 | #include <net/netns/generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | /* |
| 60 | This version of net/ipv6/sit.c is cloned of net/ipv4/ip_gre.c |
| 61 | |
| 62 | For comments look at net/ipv4/ip_gre.c --ANK |
| 63 | */ |
| 64 | |
| 65 | #define HASH_SIZE 16 |
Al Viro | e69a4adc | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 66 | #define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Nicolas Dichtel | f4e0b4c | 2012-11-27 03:07:11 +0000 | [diff] [blame] | 68 | static bool log_ecn_error = true; |
| 69 | module_param(log_ecn_error, bool, 0644); |
| 70 | MODULE_PARM_DESC(log_ecn_error, "Log packets received with corrupted ECN"); |
| 71 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 72 | static int ipip6_tunnel_init(struct net_device *dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | static void ipip6_tunnel_setup(struct net_device *dev); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 74 | static void ipip6_dev_free(struct net_device *dev); |
Hannes Frederic Sowa | 218774d | 2013-01-29 08:24:25 +0000 | [diff] [blame] | 75 | static bool check_6rd(struct ip_tunnel *tunnel, const struct in6_addr *v6dst, |
| 76 | __be32 *v4dst); |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 77 | static struct rtnl_link_ops sit_link_ops __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Eric Dumazet | f99189b | 2009-11-17 10:42:49 +0000 | [diff] [blame] | 79 | static int sit_net_id __read_mostly; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 80 | struct sit_net { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 81 | struct ip_tunnel __rcu *tunnels_r_l[HASH_SIZE]; |
| 82 | struct ip_tunnel __rcu *tunnels_r[HASH_SIZE]; |
| 83 | struct ip_tunnel __rcu *tunnels_l[HASH_SIZE]; |
| 84 | struct ip_tunnel __rcu *tunnels_wc[1]; |
| 85 | struct ip_tunnel __rcu **tunnels[4]; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 86 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 87 | struct net_device *fb_tunnel_dev; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 88 | }; |
| 89 | |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 90 | /* |
| 91 | * Must be invoked with rcu_read_lock |
| 92 | */ |
Eldad Zack | 3e86670 | 2012-04-01 07:49:01 +0000 | [diff] [blame] | 93 | static struct ip_tunnel *ipip6_tunnel_lookup(struct net *net, |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 94 | struct net_device *dev, __be32 remote, __be32 local) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 96 | unsigned int h0 = HASH(remote); |
| 97 | unsigned int h1 = HASH(local); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | struct ip_tunnel *t; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 99 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Amerigo Wang | e086cad | 2012-11-11 21:52:34 +0000 | [diff] [blame] | 101 | for_each_ip_tunnel_rcu(t, sitn->tunnels_r_l[h0 ^ h1]) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | if (local == t->parms.iph.saddr && |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 103 | remote == t->parms.iph.daddr && |
| 104 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && |
| 105 | (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | return t; |
| 107 | } |
Amerigo Wang | e086cad | 2012-11-11 21:52:34 +0000 | [diff] [blame] | 108 | for_each_ip_tunnel_rcu(t, sitn->tunnels_r[h0]) { |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 109 | if (remote == t->parms.iph.daddr && |
| 110 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && |
| 111 | (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | return t; |
| 113 | } |
Amerigo Wang | e086cad | 2012-11-11 21:52:34 +0000 | [diff] [blame] | 114 | for_each_ip_tunnel_rcu(t, sitn->tunnels_l[h1]) { |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 115 | if (local == t->parms.iph.saddr && |
| 116 | (!dev || !t->parms.link || dev->iflink == t->parms.link) && |
| 117 | (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | return t; |
| 119 | } |
Eric Dumazet | 4543c10 | 2009-10-23 17:52:14 +0000 | [diff] [blame] | 120 | t = rcu_dereference(sitn->tunnels_wc[0]); |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 121 | if ((t != NULL) && (t->dev->flags & IFF_UP)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | return t; |
| 123 | return NULL; |
| 124 | } |
| 125 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 126 | static struct ip_tunnel __rcu **__ipip6_bucket(struct sit_net *sitn, |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 127 | struct ip_tunnel_parm *parms) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | { |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 129 | __be32 remote = parms->iph.daddr; |
| 130 | __be32 local = parms->iph.saddr; |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 131 | unsigned int h = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | int prio = 0; |
| 133 | |
| 134 | if (remote) { |
| 135 | prio |= 2; |
| 136 | h ^= HASH(remote); |
| 137 | } |
| 138 | if (local) { |
| 139 | prio |= 1; |
| 140 | h ^= HASH(local); |
| 141 | } |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 142 | return &sitn->tunnels[prio][h]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | } |
| 144 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 145 | static inline struct ip_tunnel __rcu **ipip6_bucket(struct sit_net *sitn, |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 146 | struct ip_tunnel *t) |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 147 | { |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 148 | return __ipip6_bucket(sitn, &t->parms); |
YOSHIFUJI Hideaki | 420fe23 | 2007-04-24 20:44:47 +0900 | [diff] [blame] | 149 | } |
| 150 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 151 | static void ipip6_tunnel_unlink(struct sit_net *sitn, struct ip_tunnel *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 153 | struct ip_tunnel __rcu **tp; |
| 154 | struct ip_tunnel *iter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 156 | for (tp = ipip6_bucket(sitn, t); |
| 157 | (iter = rtnl_dereference(*tp)) != NULL; |
| 158 | tp = &iter->next) { |
| 159 | if (t == iter) { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 160 | rcu_assign_pointer(*tp, t->next); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | break; |
| 162 | } |
| 163 | } |
| 164 | } |
| 165 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 166 | static void ipip6_tunnel_link(struct sit_net *sitn, struct ip_tunnel *t) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 168 | struct ip_tunnel __rcu **tp = ipip6_bucket(sitn, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 170 | rcu_assign_pointer(t->next, rtnl_dereference(*tp)); |
| 171 | rcu_assign_pointer(*tp, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | } |
| 173 | |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 174 | static void ipip6_tunnel_clone_6rd(struct net_device *dev, struct sit_net *sitn) |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 175 | { |
| 176 | #ifdef CONFIG_IPV6_SIT_6RD |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 177 | struct ip_tunnel *t = netdev_priv(dev); |
| 178 | |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 179 | if (t->dev == sitn->fb_tunnel_dev) { |
| 180 | ipv6_addr_set(&t->ip6rd.prefix, htonl(0x20020000), 0, 0, 0); |
| 181 | t->ip6rd.relay_prefix = 0; |
| 182 | t->ip6rd.prefixlen = 16; |
| 183 | t->ip6rd.relay_prefixlen = 0; |
| 184 | } else { |
| 185 | struct ip_tunnel *t0 = netdev_priv(sitn->fb_tunnel_dev); |
| 186 | memcpy(&t->ip6rd, &t0->ip6rd, sizeof(t->ip6rd)); |
| 187 | } |
| 188 | #endif |
| 189 | } |
| 190 | |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 191 | static int ipip6_tunnel_create(struct net_device *dev) |
| 192 | { |
| 193 | struct ip_tunnel *t = netdev_priv(dev); |
| 194 | struct net *net = dev_net(dev); |
| 195 | struct sit_net *sitn = net_generic(net, sit_net_id); |
| 196 | int err; |
| 197 | |
| 198 | err = ipip6_tunnel_init(dev); |
| 199 | if (err < 0) |
| 200 | goto out; |
| 201 | ipip6_tunnel_clone_6rd(dev, sitn); |
| 202 | |
Nicolas Dichtel | d440b72 | 2012-11-15 04:06:41 +0000 | [diff] [blame] | 203 | if ((__force u16)t->parms.i_flags & SIT_ISATAP) |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 204 | dev->priv_flags |= IFF_ISATAP; |
| 205 | |
| 206 | err = register_netdevice(dev); |
| 207 | if (err < 0) |
| 208 | goto out; |
| 209 | |
| 210 | strcpy(t->parms.name, dev->name); |
| 211 | dev->rtnl_link_ops = &sit_link_ops; |
| 212 | |
| 213 | dev_hold(dev); |
| 214 | |
| 215 | ipip6_tunnel_link(sitn, t); |
| 216 | return 0; |
| 217 | |
| 218 | out: |
| 219 | return err; |
| 220 | } |
| 221 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 222 | static struct ip_tunnel *ipip6_tunnel_locate(struct net *net, |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 223 | struct ip_tunnel_parm *parms, int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | { |
Al Viro | e69a4adc | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 225 | __be32 remote = parms->iph.daddr; |
| 226 | __be32 local = parms->iph.saddr; |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 227 | struct ip_tunnel *t, *nt; |
| 228 | struct ip_tunnel __rcu **tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | struct net_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | char name[IFNAMSIZ]; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 231 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 233 | for (tp = __ipip6_bucket(sitn, parms); |
| 234 | (t = rtnl_dereference(*tp)) != NULL; |
| 235 | tp = &t->next) { |
Sascha Hlusiak | 8db99e5 | 2009-05-19 12:56:48 +0000 | [diff] [blame] | 236 | if (local == t->parms.iph.saddr && |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 237 | remote == t->parms.iph.daddr && |
| 238 | parms->link == t->parms.link) { |
Sascha Hlusiak | 8db99e5 | 2009-05-19 12:56:48 +0000 | [diff] [blame] | 239 | if (create) |
| 240 | return NULL; |
| 241 | else |
| 242 | return t; |
| 243 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | } |
| 245 | if (!create) |
| 246 | goto failed; |
| 247 | |
| 248 | if (parms->name[0]) |
| 249 | strlcpy(name, parms->name, IFNAMSIZ); |
Pavel Emelyanov | 34cc7ba | 2008-02-23 20:19:20 -0800 | [diff] [blame] | 250 | else |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 251 | strcpy(name, "sit%d"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
| 253 | dev = alloc_netdev(sizeof(*t), name, ipip6_tunnel_setup); |
| 254 | if (dev == NULL) |
| 255 | return NULL; |
| 256 | |
Pavel Emelyanov | 7a97146 | 2008-04-16 01:17:18 -0700 | [diff] [blame] | 257 | dev_net_set(dev, net); |
| 258 | |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 259 | nt = netdev_priv(dev); |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | nt->parms = *parms; |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 262 | if (ipip6_tunnel_create(dev) < 0) |
Pavel Emelyanov | b37d428b | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 263 | goto failed_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | return nt; |
| 266 | |
Pavel Emelyanov | b37d428b | 2008-02-26 23:51:04 -0800 | [diff] [blame] | 267 | failed_free: |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 268 | ipip6_dev_free(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | failed: |
| 270 | return NULL; |
| 271 | } |
| 272 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 273 | #define for_each_prl_rcu(start) \ |
| 274 | for (prl = rcu_dereference(start); \ |
| 275 | prl; \ |
| 276 | prl = rcu_dereference(prl->next)) |
| 277 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 278 | static struct ip_tunnel_prl_entry * |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 279 | __ipip6_tunnel_locate_prl(struct ip_tunnel *t, __be32 addr) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 280 | { |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 281 | struct ip_tunnel_prl_entry *prl; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 282 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 283 | for_each_prl_rcu(t->prl) |
| 284 | if (prl->addr == addr) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 285 | break; |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 286 | return prl; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 287 | |
| 288 | } |
| 289 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 290 | static int ipip6_tunnel_get_prl(struct ip_tunnel *t, |
| 291 | struct ip_tunnel_prl __user *a) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 292 | { |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 293 | struct ip_tunnel_prl kprl, *kp; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 294 | struct ip_tunnel_prl_entry *prl; |
| 295 | unsigned int cmax, c = 0, ca, len; |
| 296 | int ret = 0; |
| 297 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 298 | if (copy_from_user(&kprl, a, sizeof(kprl))) |
| 299 | return -EFAULT; |
| 300 | cmax = kprl.datalen / sizeof(kprl); |
| 301 | if (cmax > 1 && kprl.addr != htonl(INADDR_ANY)) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 302 | cmax = 1; |
| 303 | |
| 304 | /* For simple GET or for root users, |
| 305 | * we try harder to allocate. |
| 306 | */ |
| 307 | kp = (cmax <= 1 || capable(CAP_NET_ADMIN)) ? |
| 308 | kcalloc(cmax, sizeof(*kp), GFP_KERNEL) : |
| 309 | NULL; |
| 310 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 311 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 312 | |
| 313 | ca = t->prl_count < cmax ? t->prl_count : cmax; |
| 314 | |
| 315 | if (!kp) { |
| 316 | /* We don't try hard to allocate much memory for |
| 317 | * non-root users. |
| 318 | * For root users, retry allocating enough memory for |
| 319 | * the answer. |
| 320 | */ |
| 321 | kp = kcalloc(ca, sizeof(*kp), GFP_ATOMIC); |
| 322 | if (!kp) { |
| 323 | ret = -ENOMEM; |
| 324 | goto out; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | c = 0; |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 329 | for_each_prl_rcu(t->prl) { |
Sascha Hlusiak | 298bf12 | 2009-09-29 11:27:05 +0000 | [diff] [blame] | 330 | if (c >= cmax) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 331 | break; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 332 | if (kprl.addr != htonl(INADDR_ANY) && prl->addr != kprl.addr) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 333 | continue; |
| 334 | kp[c].addr = prl->addr; |
| 335 | kp[c].flags = prl->flags; |
| 336 | c++; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 337 | if (kprl.addr != htonl(INADDR_ANY)) |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 338 | break; |
| 339 | } |
| 340 | out: |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 341 | rcu_read_unlock(); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 342 | |
| 343 | len = sizeof(*kp) * c; |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 344 | ret = 0; |
| 345 | if ((len && copy_to_user(a + 1, kp, len)) || put_user(len, &a->datalen)) |
| 346 | ret = -EFAULT; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 347 | |
| 348 | kfree(kp); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 349 | |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 350 | return ret; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 351 | } |
| 352 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 353 | static int |
| 354 | ipip6_tunnel_add_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a, int chg) |
| 355 | { |
| 356 | struct ip_tunnel_prl_entry *p; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 357 | int err = 0; |
| 358 | |
YOSHIFUJI Hideaki | 0009ae1 | 2008-03-22 17:50:59 +0900 | [diff] [blame] | 359 | if (a->addr == htonl(INADDR_ANY)) |
| 360 | return -EINVAL; |
| 361 | |
Eric Dumazet | aac4ddd | 2010-06-01 00:26:58 -0700 | [diff] [blame] | 362 | ASSERT_RTNL(); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 363 | |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 364 | for (p = rtnl_dereference(t->prl); p; p = rtnl_dereference(p->next)) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 365 | if (p->addr == a->addr) { |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 366 | if (chg) { |
| 367 | p->flags = a->flags; |
| 368 | goto out; |
| 369 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 370 | err = -EEXIST; |
| 371 | goto out; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 372 | } |
| 373 | } |
| 374 | |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 375 | if (chg) { |
| 376 | err = -ENXIO; |
| 377 | goto out; |
| 378 | } |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 379 | |
| 380 | p = kzalloc(sizeof(struct ip_tunnel_prl_entry), GFP_KERNEL); |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 381 | if (!p) { |
| 382 | err = -ENOBUFS; |
| 383 | goto out; |
| 384 | } |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 385 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 386 | p->next = t->prl; |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 387 | p->addr = a->addr; |
| 388 | p->flags = a->flags; |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 389 | t->prl_count++; |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 390 | rcu_assign_pointer(t->prl, p); |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 391 | out: |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 392 | return err; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 393 | } |
| 394 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 395 | static void prl_list_destroy_rcu(struct rcu_head *head) |
| 396 | { |
| 397 | struct ip_tunnel_prl_entry *p, *n; |
| 398 | |
| 399 | p = container_of(head, struct ip_tunnel_prl_entry, rcu_head); |
| 400 | do { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 401 | n = rcu_dereference_protected(p->next, 1); |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 402 | kfree(p); |
| 403 | p = n; |
| 404 | } while (p); |
| 405 | } |
| 406 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 407 | static int |
| 408 | ipip6_tunnel_del_prl(struct ip_tunnel *t, struct ip_tunnel_prl *a) |
| 409 | { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 410 | struct ip_tunnel_prl_entry *x; |
| 411 | struct ip_tunnel_prl_entry __rcu **p; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 412 | int err = 0; |
| 413 | |
Eric Dumazet | aac4ddd | 2010-06-01 00:26:58 -0700 | [diff] [blame] | 414 | ASSERT_RTNL(); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 415 | |
YOSHIFUJI Hideaki | 0009ae1 | 2008-03-22 17:50:59 +0900 | [diff] [blame] | 416 | if (a && a->addr != htonl(INADDR_ANY)) { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 417 | for (p = &t->prl; |
| 418 | (x = rtnl_dereference(*p)) != NULL; |
| 419 | p = &x->next) { |
| 420 | if (x->addr == a->addr) { |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 421 | *p = x->next; |
Paul E. McKenney | 11c476f | 2011-05-02 00:56:57 -0700 | [diff] [blame] | 422 | kfree_rcu(x, rcu_head); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 423 | t->prl_count--; |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 424 | goto out; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 425 | } |
| 426 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 427 | err = -ENXIO; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 428 | } else { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 429 | x = rtnl_dereference(t->prl); |
| 430 | if (x) { |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 431 | t->prl_count = 0; |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 432 | call_rcu(&x->rcu_head, prl_list_destroy_rcu); |
| 433 | t->prl = NULL; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 434 | } |
| 435 | } |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 436 | out: |
Sascha Hlusiak | 4b2796017 | 2009-05-19 12:56:50 +0000 | [diff] [blame] | 437 | return err; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 438 | } |
| 439 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 440 | static int |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 441 | isatap_chksrc(struct sk_buff *skb, const struct iphdr *iph, struct ip_tunnel *t) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 442 | { |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 443 | struct ip_tunnel_prl_entry *p; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 444 | int ok = 1; |
| 445 | |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 446 | rcu_read_lock(); |
YOSHIFUJI Hideaki | 3fcfa12 | 2008-03-22 17:42:57 +0900 | [diff] [blame] | 447 | p = __ipip6_tunnel_locate_prl(t, iph->saddr); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 448 | if (p) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 449 | if (p->flags & PRL_DEFAULT) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 450 | skb->ndisc_nodetype = NDISC_NODETYPE_DEFAULT; |
| 451 | else |
| 452 | skb->ndisc_nodetype = NDISC_NODETYPE_NODEFAULT; |
| 453 | } else { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 454 | const struct in6_addr *addr6 = &ipv6_hdr(skb)->saddr; |
| 455 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 456 | if (ipv6_addr_is_isatap(addr6) && |
| 457 | (addr6->s6_addr32[3] == iph->saddr) && |
YOSHIFUJI Hideaki | 52eeeb8 | 2008-03-15 22:54:23 -0400 | [diff] [blame] | 458 | ipv6_chk_prefix(addr6, t->dev)) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 459 | skb->ndisc_nodetype = NDISC_NODETYPE_HOST; |
| 460 | else |
| 461 | ok = 0; |
| 462 | } |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 463 | rcu_read_unlock(); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 464 | return ok; |
| 465 | } |
| 466 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | static void ipip6_tunnel_uninit(struct net_device *dev) |
| 468 | { |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 469 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 470 | struct sit_net *sitn = net_generic(tunnel->net, sit_net_id); |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 471 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 472 | if (dev == sitn->fb_tunnel_dev) { |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 473 | RCU_INIT_POINTER(sitn->tunnels_wc[0], NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | } else { |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 475 | ipip6_tunnel_unlink(sitn, tunnel); |
| 476 | ipip6_tunnel_del_prl(tunnel, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | } |
Nicolas Dichtel | cf71d2bc | 2014-02-20 10:19:31 +0100 | [diff] [blame] | 478 | ip_tunnel_dst_reset_all(tunnel); |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 479 | dev_put(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | } |
| 481 | |
Oussama Ghorbel | ca15a07 | 2013-11-22 16:23:20 +0100 | [diff] [blame] | 482 | /* Generate icmpv6 with type/code ICMPV6_DEST_UNREACH/ICMPV6_ADDR_UNREACH |
| 483 | * if sufficient data bytes are available |
| 484 | */ |
| 485 | static int ipip6_err_gen_icmpv6_unreach(struct sk_buff *skb) |
| 486 | { |
| 487 | const struct iphdr *iph = (const struct iphdr *) skb->data; |
| 488 | struct rt6_info *rt; |
| 489 | struct sk_buff *skb2; |
| 490 | |
| 491 | if (!pskb_may_pull(skb, iph->ihl * 4 + sizeof(struct ipv6hdr) + 8)) |
| 492 | return 1; |
| 493 | |
| 494 | skb2 = skb_clone(skb, GFP_ATOMIC); |
| 495 | |
| 496 | if (!skb2) |
| 497 | return 1; |
| 498 | |
| 499 | skb_dst_drop(skb2); |
| 500 | skb_pull(skb2, iph->ihl * 4); |
| 501 | skb_reset_network_header(skb2); |
| 502 | |
| 503 | rt = rt6_lookup(dev_net(skb->dev), &ipv6_hdr(skb2)->saddr, NULL, 0, 0); |
| 504 | |
| 505 | if (rt && rt->dst.dev) |
| 506 | skb2->dev = rt->dst.dev; |
| 507 | |
| 508 | icmpv6_send(skb2, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); |
| 509 | |
| 510 | if (rt) |
| 511 | ip6_rt_put(rt); |
| 512 | |
| 513 | kfree_skb(skb2); |
| 514 | |
| 515 | return 0; |
| 516 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 518 | static int ipip6_err(struct sk_buff *skb, u32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | { |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 520 | const struct iphdr *iph = (const struct iphdr *)skb->data; |
Arnaldo Carvalho de Melo | 88c7664 | 2007-03-13 14:43:18 -0300 | [diff] [blame] | 521 | const int type = icmp_hdr(skb)->type; |
| 522 | const int code = icmp_hdr(skb)->code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | struct ip_tunnel *t; |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 524 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | |
| 526 | switch (type) { |
| 527 | default: |
| 528 | case ICMP_PARAMETERPROB: |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 529 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | |
| 531 | case ICMP_DEST_UNREACH: |
| 532 | switch (code) { |
| 533 | case ICMP_SR_FAILED: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | /* Impossible event. */ |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 535 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | default: |
| 537 | /* All others are translated to HOST_UNREACH. |
| 538 | rfc2003 contains "deep thoughts" about NET_UNREACH, |
| 539 | I believe they are just ether pollution. --ANK |
| 540 | */ |
| 541 | break; |
| 542 | } |
| 543 | break; |
| 544 | case ICMP_TIME_EXCEEDED: |
| 545 | if (code != ICMP_EXC_TTL) |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 546 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | break; |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 548 | case ICMP_REDIRECT: |
| 549 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | } |
| 551 | |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 552 | err = -ENOENT; |
| 553 | |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 554 | t = ipip6_tunnel_lookup(dev_net(skb->dev), |
| 555 | skb->dev, |
| 556 | iph->daddr, |
| 557 | iph->saddr); |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 558 | if (t == NULL) |
| 559 | goto out; |
| 560 | |
| 561 | if (type == ICMP_DEST_UNREACH && code == ICMP_FRAG_NEEDED) { |
| 562 | ipv4_update_pmtu(skb, dev_net(skb->dev), info, |
| 563 | t->dev->ifindex, 0, IPPROTO_IPV6, 0); |
| 564 | err = 0; |
| 565 | goto out; |
| 566 | } |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 567 | if (type == ICMP_REDIRECT) { |
| 568 | ipv4_redirect(skb, dev_net(skb->dev), t->dev->ifindex, 0, |
| 569 | IPPROTO_IPV6, 0); |
| 570 | err = 0; |
| 571 | goto out; |
| 572 | } |
David S. Miller | 3639339 | 2012-06-14 22:21:46 -0700 | [diff] [blame] | 573 | |
| 574 | if (t->parms.iph.daddr == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | goto out; |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 576 | |
| 577 | err = 0; |
Oussama Ghorbel | ca15a07 | 2013-11-22 16:23:20 +0100 | [diff] [blame] | 578 | if (!ipip6_err_gen_icmpv6_unreach(skb)) |
| 579 | goto out; |
| 580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | if (t->parms.iph.ttl == 0 && type == ICMP_TIME_EXCEEDED) |
| 582 | goto out; |
| 583 | |
Wei Yongjun | bb80087 | 2009-02-24 23:37:19 -0800 | [diff] [blame] | 584 | if (time_before(jiffies, t->err_time + IPTUNNEL_ERR_TIMEO)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | t->err_count++; |
| 586 | else |
| 587 | t->err_count = 1; |
| 588 | t->err_time = jiffies; |
| 589 | out: |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 590 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | } |
| 592 | |
Hannes Frederic Sowa | 218774d | 2013-01-29 08:24:25 +0000 | [diff] [blame] | 593 | static inline bool is_spoofed_6rd(struct ip_tunnel *tunnel, const __be32 v4addr, |
| 594 | const struct in6_addr *v6addr) |
| 595 | { |
| 596 | __be32 v4embed = 0; |
| 597 | if (check_6rd(tunnel, v6addr, &v4embed) && v4addr != v4embed) |
| 598 | return true; |
| 599 | return false; |
| 600 | } |
| 601 | |
Catalin\(ux\) M. BOIE | 7df37ff | 2013-09-23 23:04:19 +0300 | [diff] [blame] | 602 | /* Checks if an address matches an address on the tunnel interface. |
| 603 | * Used to detect the NAT of proto 41 packets and let them pass spoofing test. |
| 604 | * Long story: |
| 605 | * This function is called after we considered the packet as spoofed |
| 606 | * in is_spoofed_6rd. |
| 607 | * We may have a router that is doing NAT for proto 41 packets |
| 608 | * for an internal station. Destination a.a.a.a/PREFIX:bbbb:bbbb |
| 609 | * will be translated to n.n.n.n/PREFIX:bbbb:bbbb. And is_spoofed_6rd |
| 610 | * function will return true, dropping the packet. |
| 611 | * But, we can still check if is spoofed against the IP |
| 612 | * addresses associated with the interface. |
| 613 | */ |
| 614 | static bool only_dnatted(const struct ip_tunnel *tunnel, |
| 615 | const struct in6_addr *v6dst) |
| 616 | { |
| 617 | int prefix_len; |
| 618 | |
| 619 | #ifdef CONFIG_IPV6_SIT_6RD |
| 620 | prefix_len = tunnel->ip6rd.prefixlen + 32 |
| 621 | - tunnel->ip6rd.relay_prefixlen; |
| 622 | #else |
| 623 | prefix_len = 48; |
| 624 | #endif |
| 625 | return ipv6_chk_custom_prefix(v6dst, prefix_len, tunnel->dev); |
| 626 | } |
| 627 | |
| 628 | /* Returns true if a packet is spoofed */ |
| 629 | static bool packet_is_spoofed(struct sk_buff *skb, |
| 630 | const struct iphdr *iph, |
| 631 | struct ip_tunnel *tunnel) |
| 632 | { |
| 633 | const struct ipv6hdr *ipv6h; |
| 634 | |
| 635 | if (tunnel->dev->priv_flags & IFF_ISATAP) { |
| 636 | if (!isatap_chksrc(skb, iph, tunnel)) |
| 637 | return true; |
| 638 | |
| 639 | return false; |
| 640 | } |
| 641 | |
| 642 | if (tunnel->dev->flags & IFF_POINTOPOINT) |
| 643 | return false; |
| 644 | |
| 645 | ipv6h = ipv6_hdr(skb); |
| 646 | |
| 647 | if (unlikely(is_spoofed_6rd(tunnel, iph->saddr, &ipv6h->saddr))) { |
| 648 | net_warn_ratelimited("Src spoofed %pI4/%pI6c -> %pI4/%pI6c\n", |
| 649 | &iph->saddr, &ipv6h->saddr, |
| 650 | &iph->daddr, &ipv6h->daddr); |
| 651 | return true; |
| 652 | } |
| 653 | |
| 654 | if (likely(!is_spoofed_6rd(tunnel, iph->daddr, &ipv6h->daddr))) |
| 655 | return false; |
| 656 | |
| 657 | if (only_dnatted(tunnel, &ipv6h->daddr)) |
| 658 | return false; |
| 659 | |
| 660 | net_warn_ratelimited("Dst spoofed %pI4/%pI6c -> %pI4/%pI6c\n", |
| 661 | &iph->saddr, &ipv6h->saddr, |
| 662 | &iph->daddr, &ipv6h->daddr); |
| 663 | return true; |
| 664 | } |
| 665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | static int ipip6_rcv(struct sk_buff *skb) |
| 667 | { |
Hannes Frederic Sowa | 1ad759d | 2013-01-18 09:18:17 +0000 | [diff] [blame] | 668 | const struct iphdr *iph = ip_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | struct ip_tunnel *tunnel; |
Nicolas Dichtel | f4e0b4c | 2012-11-27 03:07:11 +0000 | [diff] [blame] | 670 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
Sascha Hlusiak | 4fddbf5 | 2009-05-19 12:56:49 +0000 | [diff] [blame] | 672 | tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev, |
| 673 | iph->saddr, iph->daddr); |
| 674 | if (tunnel != NULL) { |
Li RongQing | 8f84985 | 2014-01-04 13:57:59 +0800 | [diff] [blame] | 675 | struct pcpu_sw_netstats *tstats; |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 676 | |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 677 | if (tunnel->parms.iph.protocol != IPPROTO_IPV6 && |
| 678 | tunnel->parms.iph.protocol != 0) |
| 679 | goto out; |
| 680 | |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 681 | skb->mac_header = skb->network_header; |
Arnaldo Carvalho de Melo | c1d2bbe | 2007-04-10 20:45:18 -0700 | [diff] [blame] | 682 | skb_reset_network_header(skb); |
Patrick McHardy | 8cdfab8 | 2006-01-06 23:04:01 -0800 | [diff] [blame] | 683 | IPCB(skb)->flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | skb->protocol = htons(ETH_P_IPV6); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 685 | |
Catalin\(ux\) M. BOIE | 7df37ff | 2013-09-23 23:04:19 +0300 | [diff] [blame] | 686 | if (packet_is_spoofed(skb, iph, tunnel)) { |
| 687 | tunnel->dev->stats.rx_errors++; |
| 688 | goto out; |
Nicolas Dichtel | f4e0b4c | 2012-11-27 03:07:11 +0000 | [diff] [blame] | 689 | } |
| 690 | |
Nicolas Dichtel | ea23192 | 2013-09-02 15:34:58 +0200 | [diff] [blame] | 691 | __skb_tunnel_rx(skb, tunnel->dev, tunnel->net); |
Nicolas Dichtel | f4e0b4c | 2012-11-27 03:07:11 +0000 | [diff] [blame] | 692 | |
| 693 | err = IP_ECN_decapsulate(iph, skb); |
| 694 | if (unlikely(err)) { |
| 695 | if (log_ecn_error) |
| 696 | net_info_ratelimited("non-ECT from %pI4 with TOS=%#x\n", |
| 697 | &iph->saddr, iph->tos); |
| 698 | if (err > 1) { |
| 699 | ++tunnel->dev->stats.rx_frame_errors; |
| 700 | ++tunnel->dev->stats.rx_errors; |
| 701 | goto out; |
| 702 | } |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 703 | } |
Eric Dumazet | d19d56d | 2010-05-17 22:36:55 -0700 | [diff] [blame] | 704 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 705 | tstats = this_cpu_ptr(tunnel->dev->tstats); |
Li RongQing | c3ac17c | 2014-01-02 08:49:36 +0800 | [diff] [blame] | 706 | u64_stats_update_begin(&tstats->syncp); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 707 | tstats->rx_packets++; |
| 708 | tstats->rx_bytes += skb->len; |
Li RongQing | c3ac17c | 2014-01-02 08:49:36 +0800 | [diff] [blame] | 709 | u64_stats_update_end(&tstats->syncp); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 710 | |
Eric Dumazet | caf586e | 2010-09-30 21:06:55 +0000 | [diff] [blame] | 711 | netif_rx(skb); |
Eric Dumazet | 8990f46 | 2010-09-20 00:12:11 +0000 | [diff] [blame] | 712 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | return 0; |
| 714 | } |
| 715 | |
David McCullough | 6dcdd1b | 2010-11-29 19:32:34 +0000 | [diff] [blame] | 716 | /* no tunnel matched, let upstream know, ipsec may handle it */ |
David McCullough | 6dcdd1b | 2010-11-29 19:32:34 +0000 | [diff] [blame] | 717 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | out: |
David S. Miller | 36ca34c | 2008-05-08 23:40:26 -0700 | [diff] [blame] | 719 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | return 0; |
| 721 | } |
| 722 | |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 723 | static const struct tnl_ptk_info tpi = { |
| 724 | /* no tunnel info required for ipip. */ |
| 725 | .proto = htons(ETH_P_IP), |
| 726 | }; |
| 727 | |
| 728 | static int ipip_rcv(struct sk_buff *skb) |
| 729 | { |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 730 | const struct iphdr *iph; |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 731 | struct ip_tunnel *tunnel; |
| 732 | |
Pravin B Shelar | 3d7b46c | 2013-06-17 17:50:02 -0700 | [diff] [blame] | 733 | iph = ip_hdr(skb); |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 734 | tunnel = ipip6_tunnel_lookup(dev_net(skb->dev), skb->dev, |
| 735 | iph->saddr, iph->daddr); |
| 736 | if (tunnel != NULL) { |
| 737 | if (tunnel->parms.iph.protocol != IPPROTO_IPIP && |
| 738 | tunnel->parms.iph.protocol != 0) |
| 739 | goto drop; |
| 740 | |
| 741 | if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb)) |
| 742 | goto drop; |
Li Hongjun | 737e828 | 2013-08-28 11:54:50 +0200 | [diff] [blame] | 743 | if (iptunnel_pull_header(skb, 0, tpi.proto)) |
| 744 | goto drop; |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 745 | return ip_tunnel_rcv(tunnel, skb, &tpi, log_ecn_error); |
| 746 | } |
| 747 | |
| 748 | return 1; |
| 749 | |
| 750 | drop: |
| 751 | kfree_skb(skb); |
| 752 | return 0; |
| 753 | } |
| 754 | |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 755 | /* |
Hannes Frederic Sowa | 218774d | 2013-01-29 08:24:25 +0000 | [diff] [blame] | 756 | * If the IPv6 address comes from 6rd / 6to4 (RFC 3056) addr space this function |
| 757 | * stores the embedded IPv4 address in v4dst and returns true. |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 758 | */ |
Hannes Frederic Sowa | 218774d | 2013-01-29 08:24:25 +0000 | [diff] [blame] | 759 | static bool check_6rd(struct ip_tunnel *tunnel, const struct in6_addr *v6dst, |
| 760 | __be32 *v4dst) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | { |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 762 | #ifdef CONFIG_IPV6_SIT_6RD |
| 763 | if (ipv6_prefix_equal(v6dst, &tunnel->ip6rd.prefix, |
| 764 | tunnel->ip6rd.prefixlen)) { |
Eric Dumazet | 3a43be3 | 2010-09-15 11:35:10 +0000 | [diff] [blame] | 765 | unsigned int pbw0, pbi0; |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 766 | int pbi1; |
| 767 | u32 d; |
| 768 | |
| 769 | pbw0 = tunnel->ip6rd.prefixlen >> 5; |
| 770 | pbi0 = tunnel->ip6rd.prefixlen & 0x1f; |
| 771 | |
YOSHIFUJI Hideaki / 吉藤英明 | e7db38c | 2009-10-11 03:44:45 +0000 | [diff] [blame] | 772 | d = (ntohl(v6dst->s6_addr32[pbw0]) << pbi0) >> |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 773 | tunnel->ip6rd.relay_prefixlen; |
| 774 | |
| 775 | pbi1 = pbi0 - tunnel->ip6rd.relay_prefixlen; |
| 776 | if (pbi1 > 0) |
YOSHIFUJI Hideaki / 吉藤英明 | e7db38c | 2009-10-11 03:44:45 +0000 | [diff] [blame] | 777 | d |= ntohl(v6dst->s6_addr32[pbw0 + 1]) >> |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 778 | (32 - pbi1); |
| 779 | |
Hannes Frederic Sowa | 218774d | 2013-01-29 08:24:25 +0000 | [diff] [blame] | 780 | *v4dst = tunnel->ip6rd.relay_prefix | htonl(d); |
| 781 | return true; |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 782 | } |
| 783 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | if (v6dst->s6_addr16[0] == htons(0x2002)) { |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 785 | /* 6to4 v6 addr has 16 bits prefix, 32 v4addr, 16 SLA, ... */ |
Hannes Frederic Sowa | 218774d | 2013-01-29 08:24:25 +0000 | [diff] [blame] | 786 | memcpy(v4dst, &v6dst->s6_addr16[1], 4); |
| 787 | return true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | } |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 789 | #endif |
Hannes Frederic Sowa | 218774d | 2013-01-29 08:24:25 +0000 | [diff] [blame] | 790 | return false; |
| 791 | } |
| 792 | |
| 793 | static inline __be32 try_6rd(struct ip_tunnel *tunnel, |
| 794 | const struct in6_addr *v6dst) |
| 795 | { |
| 796 | __be32 dst = 0; |
| 797 | check_6rd(tunnel, v6dst, &dst); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | return dst; |
| 799 | } |
| 800 | |
| 801 | /* |
| 802 | * This function assumes it is being called from dev_queue_xmit() |
| 803 | * and that skb is filled properly by that function. |
| 804 | */ |
| 805 | |
Stephen Hemminger | 6fef4c0 | 2009-08-31 19:50:41 +0000 | [diff] [blame] | 806 | static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb, |
| 807 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 809 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 810 | const struct iphdr *tiph = &tunnel->parms.iph; |
| 811 | const struct ipv6hdr *iph6 = ipv6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | u8 tos = tunnel->parms.iph.tos; |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 813 | __be16 df = tiph->frag_off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | struct rtable *rt; /* Route to the other host */ |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 815 | struct net_device *tdev; /* Device to other host */ |
Chuck Lever | c2636b4 | 2007-10-23 21:07:32 -0700 | [diff] [blame] | 816 | unsigned int max_headroom; /* The extra header space needed */ |
Al Viro | e69a4adc | 2006-11-14 20:56:00 -0800 | [diff] [blame] | 817 | __be32 dst = tiph->daddr; |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 818 | struct flowi4 fl4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | int mtu; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 820 | const struct in6_addr *addr6; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | int addr_type; |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 822 | u8 ttl; |
| 823 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | if (skb->protocol != htons(ETH_P_IPV6)) |
| 826 | goto tx_error; |
| 827 | |
Lionel Elie Mamane | c2bceb3 | 2011-08-13 14:04:38 +0000 | [diff] [blame] | 828 | if (tos == 1) |
| 829 | tos = ipv6_get_dsfield(iph6); |
| 830 | |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 831 | /* ISATAP (RFC4214) - must come before 6to4 */ |
| 832 | if (dev->priv_flags & IFF_ISATAP) { |
| 833 | struct neighbour *neigh = NULL; |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 834 | bool do_tx_error = false; |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 835 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 836 | if (skb_dst(skb)) |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 837 | neigh = dst_neigh_lookup(skb_dst(skb), &iph6->daddr); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 838 | |
| 839 | if (neigh == NULL) { |
Catalin\(ux\) M. BOIE | 7df37ff | 2013-09-23 23:04:19 +0300 | [diff] [blame] | 840 | net_dbg_ratelimited("nexthop == NULL\n"); |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 841 | goto tx_error; |
| 842 | } |
| 843 | |
Eldad Zack | 3e86670 | 2012-04-01 07:49:01 +0000 | [diff] [blame] | 844 | addr6 = (const struct in6_addr *)&neigh->primary_key; |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 845 | addr_type = ipv6_addr_type(addr6); |
| 846 | |
| 847 | if ((addr_type & IPV6_ADDR_UNICAST) && |
| 848 | ipv6_addr_is_isatap(addr6)) |
| 849 | dst = addr6->s6_addr32[3]; |
| 850 | else |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 851 | do_tx_error = true; |
| 852 | |
| 853 | neigh_release(neigh); |
| 854 | if (do_tx_error) |
Fred L. Templin | c7dc89c | 2007-11-29 22:11:40 +1100 | [diff] [blame] | 855 | goto tx_error; |
| 856 | } |
| 857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | if (!dst) |
Hannes Frederic Sowa | 218774d | 2013-01-29 08:24:25 +0000 | [diff] [blame] | 859 | dst = try_6rd(tunnel, &iph6->daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | |
| 861 | if (!dst) { |
| 862 | struct neighbour *neigh = NULL; |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 863 | bool do_tx_error = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 865 | if (skb_dst(skb)) |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 866 | neigh = dst_neigh_lookup(skb_dst(skb), &iph6->daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | |
| 868 | if (neigh == NULL) { |
Catalin\(ux\) M. BOIE | 7df37ff | 2013-09-23 23:04:19 +0300 | [diff] [blame] | 869 | net_dbg_ratelimited("nexthop == NULL\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | goto tx_error; |
| 871 | } |
| 872 | |
Eldad Zack | 3e86670 | 2012-04-01 07:49:01 +0000 | [diff] [blame] | 873 | addr6 = (const struct in6_addr *)&neigh->primary_key; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | addr_type = ipv6_addr_type(addr6); |
| 875 | |
| 876 | if (addr_type == IPV6_ADDR_ANY) { |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 877 | addr6 = &ipv6_hdr(skb)->daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | addr_type = ipv6_addr_type(addr6); |
| 879 | } |
| 880 | |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 881 | if ((addr_type & IPV6_ADDR_COMPATv4) != 0) |
| 882 | dst = addr6->s6_addr32[3]; |
| 883 | else |
| 884 | do_tx_error = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | |
David S. Miller | 1e2927b | 2012-01-26 15:23:21 -0500 | [diff] [blame] | 886 | neigh_release(neigh); |
| 887 | if (do_tx_error) |
| 888 | goto tx_error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | } |
| 890 | |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 891 | rt = ip_route_output_ports(tunnel->net, &fl4, NULL, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 892 | dst, tiph->saddr, |
| 893 | 0, 0, |
| 894 | IPPROTO_IPV6, RT_TOS(tos), |
| 895 | tunnel->parms.link); |
| 896 | if (IS_ERR(rt)) { |
| 897 | dev->stats.tx_carrier_errors++; |
| 898 | goto tx_error_icmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | } |
| 900 | if (rt->rt_type != RTN_UNICAST) { |
| 901 | ip_rt_put(rt); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 902 | dev->stats.tx_carrier_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | goto tx_error_icmp; |
| 904 | } |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 905 | tdev = rt->dst.dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
| 907 | if (tdev == dev) { |
| 908 | ip_rt_put(rt); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 909 | dev->stats.collisions++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | goto tx_error; |
| 911 | } |
| 912 | |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 913 | if (df) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 914 | mtu = dst_mtu(&rt->dst) - sizeof(struct iphdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 916 | if (mtu < 68) { |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 917 | dev->stats.collisions++; |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 918 | ip_rt_put(rt); |
| 919 | goto tx_error; |
| 920 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 922 | if (mtu < IPV6_MIN_MTU) { |
| 923 | mtu = IPV6_MIN_MTU; |
| 924 | df = 0; |
| 925 | } |
| 926 | |
| 927 | if (tunnel->parms.iph.daddr && skb_dst(skb)) |
David S. Miller | 6700c27 | 2012-07-17 03:29:28 -0700 | [diff] [blame] | 928 | skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu); |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 929 | |
Eric Dumazet | 58a4782 | 2013-12-16 06:31:23 -0800 | [diff] [blame] | 930 | if (skb->len > mtu && !skb_is_gso(skb)) { |
Alexey Dobriyan | 3ffe533 | 2010-02-18 08:25:24 +0000 | [diff] [blame] | 931 | icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu); |
Herbert Xu | 292f4f3 | 2009-11-09 08:42:01 +0000 | [diff] [blame] | 932 | ip_rt_put(rt); |
| 933 | goto tx_error; |
| 934 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | if (tunnel->err_count > 0) { |
Wei Yongjun | bb80087 | 2009-02-24 23:37:19 -0800 | [diff] [blame] | 938 | if (time_before(jiffies, |
| 939 | tunnel->err_time + IPTUNNEL_ERR_TIMEO)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | tunnel->err_count--; |
| 941 | dst_link_failure(skb); |
| 942 | } else |
| 943 | tunnel->err_count = 0; |
| 944 | } |
| 945 | |
| 946 | /* |
| 947 | * Okay, now see if we can stuff it in the buffer as-is. |
| 948 | */ |
| 949 | max_headroom = LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr); |
| 950 | |
Patrick McHardy | cfbba49 | 2007-07-09 15:33:40 -0700 | [diff] [blame] | 951 | if (skb_headroom(skb) < max_headroom || skb_shared(skb) || |
| 952 | (skb_cloned(skb) && !skb_clone_writable(skb, 0))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom); |
| 954 | if (!new_skb) { |
| 955 | ip_rt_put(rt); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 956 | dev->stats.tx_dropped++; |
Gao feng | 6602831 | 2013-11-25 17:21:24 +0800 | [diff] [blame] | 957 | kfree_skb(skb); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 958 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | } |
| 960 | if (skb->sk) |
| 961 | skb_set_owner_w(new_skb, skb->sk); |
| 962 | dev_kfree_skb(skb); |
| 963 | skb = new_skb; |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 964 | iph6 = ipv6_hdr(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | } |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 966 | ttl = tiph->ttl; |
| 967 | if (ttl == 0) |
| 968 | ttl = iph6->hop_limit; |
| 969 | tos = INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | |
Eric Dumazet | 61c1db7 | 2013-10-20 20:47:30 -0700 | [diff] [blame] | 971 | skb = iptunnel_handle_offloads(skb, false, SKB_GSO_SIT); |
Li RongQing | 6a9eadc | 2013-12-20 17:20:12 +0800 | [diff] [blame] | 972 | if (IS_ERR(skb)) { |
| 973 | ip_rt_put(rt); |
Eric Dumazet | 61c1db7 | 2013-10-20 20:47:30 -0700 | [diff] [blame] | 974 | goto out; |
Li RongQing | 6a9eadc | 2013-12-20 17:20:12 +0800 | [diff] [blame] | 975 | } |
Hannes Frederic Sowa | 3d48305 | 2013-08-18 13:46:52 +0200 | [diff] [blame] | 976 | |
Eric Dumazet | aad8872 | 2014-04-15 13:47:15 -0400 | [diff] [blame^] | 977 | err = iptunnel_xmit(skb->sk, rt, skb, fl4.saddr, fl4.daddr, |
| 978 | IPPROTO_IPV6, tos, ttl, df, |
| 979 | !net_eq(tunnel->net, dev_net(dev))); |
Pravin B Shelar | 0e6fbc5 | 2013-06-17 17:49:56 -0700 | [diff] [blame] | 980 | iptunnel_xmit_stats(err, &dev->stats, dev->tstats); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 981 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | |
| 983 | tx_error_icmp: |
| 984 | dst_link_failure(skb); |
| 985 | tx_error: |
Gao feng | 6602831 | 2013-11-25 17:21:24 +0800 | [diff] [blame] | 986 | kfree_skb(skb); |
Eric Dumazet | 61c1db7 | 2013-10-20 20:47:30 -0700 | [diff] [blame] | 987 | out: |
| 988 | dev->stats.tx_errors++; |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 989 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | } |
| 991 | |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 992 | static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev) |
| 993 | { |
| 994 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 995 | const struct iphdr *tiph = &tunnel->parms.iph; |
| 996 | |
Eric Dumazet | 61c1db7 | 2013-10-20 20:47:30 -0700 | [diff] [blame] | 997 | skb = iptunnel_handle_offloads(skb, false, SKB_GSO_IPIP); |
| 998 | if (IS_ERR(skb)) |
| 999 | goto out; |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1000 | |
| 1001 | ip_tunnel_xmit(skb, dev, tiph, IPPROTO_IPIP); |
| 1002 | return NETDEV_TX_OK; |
Eric Dumazet | 61c1db7 | 2013-10-20 20:47:30 -0700 | [diff] [blame] | 1003 | out: |
| 1004 | dev->stats.tx_errors++; |
| 1005 | return NETDEV_TX_OK; |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1006 | } |
| 1007 | |
| 1008 | static netdev_tx_t sit_tunnel_xmit(struct sk_buff *skb, |
| 1009 | struct net_device *dev) |
| 1010 | { |
| 1011 | switch (skb->protocol) { |
| 1012 | case htons(ETH_P_IP): |
| 1013 | ipip_tunnel_xmit(skb, dev); |
| 1014 | break; |
| 1015 | case htons(ETH_P_IPV6): |
| 1016 | ipip6_tunnel_xmit(skb, dev); |
| 1017 | break; |
| 1018 | default: |
| 1019 | goto tx_err; |
| 1020 | } |
| 1021 | |
| 1022 | return NETDEV_TX_OK; |
| 1023 | |
| 1024 | tx_err: |
| 1025 | dev->stats.tx_errors++; |
Gao feng | 6602831 | 2013-11-25 17:21:24 +0800 | [diff] [blame] | 1026 | kfree_skb(skb); |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1027 | return NETDEV_TX_OK; |
| 1028 | |
| 1029 | } |
| 1030 | |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 1031 | static void ipip6_tunnel_bind_dev(struct net_device *dev) |
| 1032 | { |
| 1033 | struct net_device *tdev = NULL; |
| 1034 | struct ip_tunnel *tunnel; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1035 | const struct iphdr *iph; |
David S. Miller | 31e4543 | 2011-05-03 20:25:42 -0700 | [diff] [blame] | 1036 | struct flowi4 fl4; |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 1037 | |
| 1038 | tunnel = netdev_priv(dev); |
| 1039 | iph = &tunnel->parms.iph; |
| 1040 | |
| 1041 | if (iph->daddr) { |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1042 | struct rtable *rt = ip_route_output_ports(tunnel->net, &fl4, |
| 1043 | NULL, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 1044 | iph->daddr, iph->saddr, |
| 1045 | 0, 0, |
| 1046 | IPPROTO_IPV6, |
| 1047 | RT_TOS(iph->tos), |
| 1048 | tunnel->parms.link); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1049 | |
| 1050 | if (!IS_ERR(rt)) { |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1051 | tdev = rt->dst.dev; |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 1052 | ip_rt_put(rt); |
| 1053 | } |
| 1054 | dev->flags |= IFF_POINTOPOINT; |
| 1055 | } |
| 1056 | |
| 1057 | if (!tdev && tunnel->parms.link) |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1058 | tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link); |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 1059 | |
| 1060 | if (tdev) { |
| 1061 | dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr); |
| 1062 | dev->mtu = tdev->mtu - sizeof(struct iphdr); |
| 1063 | if (dev->mtu < IPV6_MIN_MTU) |
| 1064 | dev->mtu = IPV6_MIN_MTU; |
| 1065 | } |
| 1066 | dev->iflink = tunnel->parms.link; |
| 1067 | } |
| 1068 | |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1069 | static void ipip6_tunnel_update(struct ip_tunnel *t, struct ip_tunnel_parm *p) |
| 1070 | { |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1071 | struct net *net = t->net; |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1072 | struct sit_net *sitn = net_generic(net, sit_net_id); |
| 1073 | |
| 1074 | ipip6_tunnel_unlink(sitn, t); |
| 1075 | synchronize_net(); |
| 1076 | t->parms.iph.saddr = p->iph.saddr; |
| 1077 | t->parms.iph.daddr = p->iph.daddr; |
| 1078 | memcpy(t->dev->dev_addr, &p->iph.saddr, 4); |
| 1079 | memcpy(t->dev->broadcast, &p->iph.daddr, 4); |
| 1080 | ipip6_tunnel_link(sitn, t); |
| 1081 | t->parms.iph.ttl = p->iph.ttl; |
| 1082 | t->parms.iph.tos = p->iph.tos; |
| 1083 | if (t->parms.link != p->link) { |
| 1084 | t->parms.link = p->link; |
| 1085 | ipip6_tunnel_bind_dev(t->dev); |
| 1086 | } |
Nicolas Dichtel | cf71d2bc | 2014-02-20 10:19:31 +0100 | [diff] [blame] | 1087 | ip_tunnel_dst_reset_all(t); |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1088 | netdev_state_change(t->dev); |
| 1089 | } |
| 1090 | |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1091 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1092 | static int ipip6_tunnel_update_6rd(struct ip_tunnel *t, |
| 1093 | struct ip_tunnel_6rd *ip6rd) |
| 1094 | { |
| 1095 | struct in6_addr prefix; |
| 1096 | __be32 relay_prefix; |
| 1097 | |
| 1098 | if (ip6rd->relay_prefixlen > 32 || |
| 1099 | ip6rd->prefixlen + (32 - ip6rd->relay_prefixlen) > 64) |
| 1100 | return -EINVAL; |
| 1101 | |
| 1102 | ipv6_addr_prefix(&prefix, &ip6rd->prefix, ip6rd->prefixlen); |
| 1103 | if (!ipv6_addr_equal(&prefix, &ip6rd->prefix)) |
| 1104 | return -EINVAL; |
| 1105 | if (ip6rd->relay_prefixlen) |
| 1106 | relay_prefix = ip6rd->relay_prefix & |
| 1107 | htonl(0xffffffffUL << |
| 1108 | (32 - ip6rd->relay_prefixlen)); |
| 1109 | else |
| 1110 | relay_prefix = 0; |
| 1111 | if (relay_prefix != ip6rd->relay_prefix) |
| 1112 | return -EINVAL; |
| 1113 | |
| 1114 | t->ip6rd.prefix = prefix; |
| 1115 | t->ip6rd.relay_prefix = relay_prefix; |
| 1116 | t->ip6rd.prefixlen = ip6rd->prefixlen; |
| 1117 | t->ip6rd.relay_prefixlen = ip6rd->relay_prefixlen; |
Nicolas Dichtel | cf71d2bc | 2014-02-20 10:19:31 +0100 | [diff] [blame] | 1118 | ip_tunnel_dst_reset_all(t); |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1119 | netdev_state_change(t->dev); |
| 1120 | return 0; |
| 1121 | } |
| 1122 | #endif |
| 1123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | static int |
| 1125 | ipip6_tunnel_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd) |
| 1126 | { |
| 1127 | int err = 0; |
| 1128 | struct ip_tunnel_parm p; |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1129 | struct ip_tunnel_prl prl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | struct ip_tunnel *t; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 1131 | struct net *net = dev_net(dev); |
| 1132 | struct sit_net *sitn = net_generic(net, sit_net_id); |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1133 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1134 | struct ip_tunnel_6rd ip6rd; |
| 1135 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | |
| 1137 | switch (cmd) { |
| 1138 | case SIOCGETTUNNEL: |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1139 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1140 | case SIOCGET6RD: |
| 1141 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | t = NULL; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1143 | if (dev == sitn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) { |
| 1145 | err = -EFAULT; |
| 1146 | break; |
| 1147 | } |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 1148 | t = ipip6_tunnel_locate(net, &p, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | } |
| 1150 | if (t == NULL) |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 1151 | t = netdev_priv(dev); |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1152 | |
| 1153 | err = -EFAULT; |
| 1154 | if (cmd == SIOCGETTUNNEL) { |
| 1155 | memcpy(&p, &t->parms, sizeof(p)); |
| 1156 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, |
| 1157 | sizeof(p))) |
| 1158 | goto done; |
| 1159 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1160 | } else { |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 1161 | ip6rd.prefix = t->ip6rd.prefix; |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1162 | ip6rd.relay_prefix = t->ip6rd.relay_prefix; |
| 1163 | ip6rd.prefixlen = t->ip6rd.prefixlen; |
| 1164 | ip6rd.relay_prefixlen = t->ip6rd.relay_prefixlen; |
| 1165 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &ip6rd, |
| 1166 | sizeof(ip6rd))) |
| 1167 | goto done; |
| 1168 | #endif |
| 1169 | } |
| 1170 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | break; |
| 1172 | |
| 1173 | case SIOCADDTUNNEL: |
| 1174 | case SIOCCHGTUNNEL: |
| 1175 | err = -EPERM; |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1176 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | goto done; |
| 1178 | |
| 1179 | err = -EFAULT; |
| 1180 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 1181 | goto done; |
| 1182 | |
| 1183 | err = -EINVAL; |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1184 | if (p.iph.protocol != IPPROTO_IPV6 && |
| 1185 | p.iph.protocol != IPPROTO_IPIP && |
| 1186 | p.iph.protocol != 0) |
| 1187 | goto done; |
| 1188 | if (p.iph.version != 4 || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | p.iph.ihl != 5 || (p.iph.frag_off&htons(~IP_DF))) |
| 1190 | goto done; |
| 1191 | if (p.iph.ttl) |
| 1192 | p.iph.frag_off |= htons(IP_DF); |
| 1193 | |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 1194 | t = ipip6_tunnel_locate(net, &p, cmd == SIOCADDTUNNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1196 | if (dev != sitn->fb_tunnel_dev && cmd == SIOCCHGTUNNEL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | if (t != NULL) { |
| 1198 | if (t->dev != dev) { |
| 1199 | err = -EEXIST; |
| 1200 | break; |
| 1201 | } |
| 1202 | } else { |
| 1203 | if (((dev->flags&IFF_POINTOPOINT) && !p.iph.daddr) || |
| 1204 | (!(dev->flags&IFF_POINTOPOINT) && p.iph.daddr)) { |
| 1205 | err = -EINVAL; |
| 1206 | break; |
| 1207 | } |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 1208 | t = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | } |
Nicolas Dichtel | f9cd5a5 | 2012-11-14 05:14:04 +0000 | [diff] [blame] | 1210 | |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1211 | ipip6_tunnel_update(t, &p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | } |
| 1213 | |
| 1214 | if (t) { |
| 1215 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | if (copy_to_user(ifr->ifr_ifru.ifru_data, &t->parms, sizeof(p))) |
| 1217 | err = -EFAULT; |
| 1218 | } else |
| 1219 | err = (cmd == SIOCADDTUNNEL ? -ENOBUFS : -ENOENT); |
| 1220 | break; |
| 1221 | |
| 1222 | case SIOCDELTUNNEL: |
| 1223 | err = -EPERM; |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1224 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | goto done; |
| 1226 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1227 | if (dev == sitn->fb_tunnel_dev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | err = -EFAULT; |
| 1229 | if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) |
| 1230 | goto done; |
| 1231 | err = -ENOENT; |
Pavel Emelyanov | ca8def1 | 2008-04-16 01:15:39 -0700 | [diff] [blame] | 1232 | if ((t = ipip6_tunnel_locate(net, &p, 0)) == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | goto done; |
| 1234 | err = -EPERM; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1235 | if (t == netdev_priv(sitn->fb_tunnel_dev)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | goto done; |
| 1237 | dev = t->dev; |
| 1238 | } |
Stephen Hemminger | 22f8cde | 2007-02-07 00:09:58 -0800 | [diff] [blame] | 1239 | unregister_netdevice(dev); |
| 1240 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | break; |
| 1242 | |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1243 | case SIOCGETPRL: |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 1244 | err = -EINVAL; |
| 1245 | if (dev == sitn->fb_tunnel_dev) |
| 1246 | goto done; |
| 1247 | err = -ENOENT; |
| 1248 | if (!(t = netdev_priv(dev))) |
| 1249 | goto done; |
| 1250 | err = ipip6_tunnel_get_prl(t, ifr->ifr_ifru.ifru_data); |
| 1251 | break; |
| 1252 | |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1253 | case SIOCADDPRL: |
| 1254 | case SIOCDELPRL: |
| 1255 | case SIOCCHGPRL: |
| 1256 | err = -EPERM; |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1257 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1258 | goto done; |
| 1259 | err = -EINVAL; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1260 | if (dev == sitn->fb_tunnel_dev) |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1261 | goto done; |
| 1262 | err = -EFAULT; |
| 1263 | if (copy_from_user(&prl, ifr->ifr_ifru.ifru_data, sizeof(prl))) |
| 1264 | goto done; |
| 1265 | err = -ENOENT; |
| 1266 | if (!(t = netdev_priv(dev))) |
| 1267 | goto done; |
| 1268 | |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1269 | switch (cmd) { |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1270 | case SIOCDELPRL: |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1271 | err = ipip6_tunnel_del_prl(t, &prl); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1272 | break; |
| 1273 | case SIOCADDPRL: |
| 1274 | case SIOCCHGPRL: |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1275 | err = ipip6_tunnel_add_prl(t, &prl, cmd == SIOCCHGPRL); |
YOSHIFUJI Hideaki | 300aaee | 2008-03-24 18:28:39 +0900 | [diff] [blame] | 1276 | break; |
| 1277 | } |
Nicolas Dichtel | cf71d2bc | 2014-02-20 10:19:31 +0100 | [diff] [blame] | 1278 | ip_tunnel_dst_reset_all(t); |
YOSHIFUJI Hideaki | 2b4743b | 2008-06-16 16:48:20 -0700 | [diff] [blame] | 1279 | netdev_state_change(dev); |
Templin, Fred L | fadf6bf | 2008-03-11 18:35:59 -0400 | [diff] [blame] | 1280 | break; |
| 1281 | |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1282 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1283 | case SIOCADD6RD: |
| 1284 | case SIOCCHG6RD: |
| 1285 | case SIOCDEL6RD: |
| 1286 | err = -EPERM; |
Eric W. Biederman | af31f41 | 2012-11-16 03:03:06 +0000 | [diff] [blame] | 1287 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1288 | goto done; |
| 1289 | |
| 1290 | err = -EFAULT; |
| 1291 | if (copy_from_user(&ip6rd, ifr->ifr_ifru.ifru_data, |
| 1292 | sizeof(ip6rd))) |
| 1293 | goto done; |
| 1294 | |
| 1295 | t = netdev_priv(dev); |
| 1296 | |
| 1297 | if (cmd != SIOCDEL6RD) { |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1298 | err = ipip6_tunnel_update_6rd(t, &ip6rd); |
| 1299 | if (err < 0) |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1300 | goto done; |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1301 | } else |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 1302 | ipip6_tunnel_clone_6rd(dev, sitn); |
YOSHIFUJI Hideaki / 吉藤英明 | fa857af | 2009-09-22 23:43:14 +0000 | [diff] [blame] | 1303 | |
| 1304 | err = 0; |
| 1305 | break; |
| 1306 | #endif |
| 1307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | default: |
| 1309 | err = -EINVAL; |
| 1310 | } |
| 1311 | |
| 1312 | done: |
| 1313 | return err; |
| 1314 | } |
| 1315 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu) |
| 1317 | { |
| 1318 | if (new_mtu < IPV6_MIN_MTU || new_mtu > 0xFFF8 - sizeof(struct iphdr)) |
| 1319 | return -EINVAL; |
| 1320 | dev->mtu = new_mtu; |
| 1321 | return 0; |
| 1322 | } |
| 1323 | |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1324 | static const struct net_device_ops ipip6_netdev_ops = { |
| 1325 | .ndo_uninit = ipip6_tunnel_uninit, |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1326 | .ndo_start_xmit = sit_tunnel_xmit, |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1327 | .ndo_do_ioctl = ipip6_tunnel_ioctl, |
| 1328 | .ndo_change_mtu = ipip6_tunnel_change_mtu, |
Pravin B Shelar | f61dd38 | 2013-03-25 14:50:00 +0000 | [diff] [blame] | 1329 | .ndo_get_stats64 = ip_tunnel_get_stats64, |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1330 | }; |
| 1331 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1332 | static void ipip6_dev_free(struct net_device *dev) |
| 1333 | { |
Nicolas Dichtel | cf71d2bc | 2014-02-20 10:19:31 +0100 | [diff] [blame] | 1334 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 1335 | |
| 1336 | free_percpu(tunnel->dst_cache); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1337 | free_percpu(dev->tstats); |
| 1338 | free_netdev(dev); |
| 1339 | } |
| 1340 | |
Eric Dumazet | 61c1db7 | 2013-10-20 20:47:30 -0700 | [diff] [blame] | 1341 | #define SIT_FEATURES (NETIF_F_SG | \ |
| 1342 | NETIF_F_FRAGLIST | \ |
| 1343 | NETIF_F_HIGHDMA | \ |
| 1344 | NETIF_F_GSO_SOFTWARE | \ |
| 1345 | NETIF_F_HW_CSUM) |
| 1346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | static void ipip6_tunnel_setup(struct net_device *dev) |
| 1348 | { |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1349 | dev->netdev_ops = &ipip6_netdev_ops; |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1350 | dev->destructor = ipip6_dev_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | |
| 1352 | dev->type = ARPHRD_SIT; |
| 1353 | dev->hard_header_len = LL_MAX_HEADER + sizeof(struct iphdr); |
Kris Katterjohn | 46f25df | 2006-01-05 16:35:42 -0800 | [diff] [blame] | 1354 | dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | dev->flags = IFF_NOARP; |
Sascha Hlusiak | f2ba025 | 2009-07-11 20:30:52 -0700 | [diff] [blame] | 1356 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | dev->iflink = 0; |
| 1358 | dev->addr_len = 4; |
Eric Dumazet | 8df40d1 | 2010-09-28 02:53:41 +0000 | [diff] [blame] | 1359 | dev->features |= NETIF_F_LLTX; |
Eric Dumazet | 61c1db7 | 2013-10-20 20:47:30 -0700 | [diff] [blame] | 1360 | dev->features |= SIT_FEATURES; |
| 1361 | dev->hw_features |= SIT_FEATURES; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
| 1363 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1364 | static int ipip6_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | { |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1366 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | |
| 1368 | tunnel->dev = dev; |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1369 | tunnel->net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | |
| 1371 | memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4); |
| 1372 | memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4); |
| 1373 | |
Michal Schmidt | 8a4a50f | 2007-12-13 09:47:00 -0800 | [diff] [blame] | 1374 | ipip6_tunnel_bind_dev(dev); |
WANG Cong | 1c213bd | 2014-02-13 11:46:28 -0800 | [diff] [blame] | 1375 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1376 | if (!dev->tstats) |
| 1377 | return -ENOMEM; |
| 1378 | |
Nicolas Dichtel | cf71d2bc | 2014-02-20 10:19:31 +0100 | [diff] [blame] | 1379 | tunnel->dst_cache = alloc_percpu(struct ip_tunnel_dst); |
| 1380 | if (!tunnel->dst_cache) { |
| 1381 | free_percpu(dev->tstats); |
| 1382 | return -ENOMEM; |
| 1383 | } |
| 1384 | |
Eric Dumazet | 15fc1f7 | 2010-09-27 00:38:18 +0000 | [diff] [blame] | 1385 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | } |
| 1387 | |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1388 | static int __net_init ipip6_fb_tunnel_init(struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | { |
Patrick McHardy | 2941a48 | 2006-01-08 22:05:26 -0800 | [diff] [blame] | 1390 | struct ip_tunnel *tunnel = netdev_priv(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | struct iphdr *iph = &tunnel->parms.iph; |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 1392 | struct net *net = dev_net(dev); |
| 1393 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | |
| 1395 | tunnel->dev = dev; |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1396 | tunnel->net = dev_net(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | strcpy(tunnel->parms.name, dev->name); |
| 1398 | |
| 1399 | iph->version = 4; |
| 1400 | iph->protocol = IPPROTO_IPV6; |
| 1401 | iph->ihl = 5; |
| 1402 | iph->ttl = 64; |
| 1403 | |
WANG Cong | 1c213bd | 2014-02-13 11:46:28 -0800 | [diff] [blame] | 1404 | dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1405 | if (!dev->tstats) |
| 1406 | return -ENOMEM; |
John Stultz | 827da44 | 2013-10-07 15:51:58 -0700 | [diff] [blame] | 1407 | |
Nicolas Dichtel | cf71d2bc | 2014-02-20 10:19:31 +0100 | [diff] [blame] | 1408 | tunnel->dst_cache = alloc_percpu(struct ip_tunnel_dst); |
| 1409 | if (!tunnel->dst_cache) { |
| 1410 | free_percpu(dev->tstats); |
| 1411 | return -ENOMEM; |
| 1412 | } |
| 1413 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | dev_hold(dev); |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 1415 | rcu_assign_pointer(sitn->tunnels_wc[0], tunnel); |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1416 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | } |
| 1418 | |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1419 | static int ipip6_validate(struct nlattr *tb[], struct nlattr *data[]) |
| 1420 | { |
| 1421 | u8 proto; |
| 1422 | |
Nicolas Dichtel | c2ff682 | 2013-06-19 12:03:13 +0200 | [diff] [blame] | 1423 | if (!data || !data[IFLA_IPTUN_PROTO]) |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1424 | return 0; |
| 1425 | |
| 1426 | proto = nla_get_u8(data[IFLA_IPTUN_PROTO]); |
| 1427 | if (proto != IPPROTO_IPV6 && |
| 1428 | proto != IPPROTO_IPIP && |
| 1429 | proto != 0) |
| 1430 | return -EINVAL; |
| 1431 | |
| 1432 | return 0; |
| 1433 | } |
| 1434 | |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1435 | static void ipip6_netlink_parms(struct nlattr *data[], |
| 1436 | struct ip_tunnel_parm *parms) |
| 1437 | { |
| 1438 | memset(parms, 0, sizeof(*parms)); |
| 1439 | |
| 1440 | parms->iph.version = 4; |
| 1441 | parms->iph.protocol = IPPROTO_IPV6; |
| 1442 | parms->iph.ihl = 5; |
| 1443 | parms->iph.ttl = 64; |
| 1444 | |
| 1445 | if (!data) |
| 1446 | return; |
| 1447 | |
| 1448 | if (data[IFLA_IPTUN_LINK]) |
| 1449 | parms->link = nla_get_u32(data[IFLA_IPTUN_LINK]); |
| 1450 | |
| 1451 | if (data[IFLA_IPTUN_LOCAL]) |
Nicolas Dichtel | d440b72 | 2012-11-15 04:06:41 +0000 | [diff] [blame] | 1452 | parms->iph.saddr = nla_get_be32(data[IFLA_IPTUN_LOCAL]); |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1453 | |
| 1454 | if (data[IFLA_IPTUN_REMOTE]) |
Nicolas Dichtel | d440b72 | 2012-11-15 04:06:41 +0000 | [diff] [blame] | 1455 | parms->iph.daddr = nla_get_be32(data[IFLA_IPTUN_REMOTE]); |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1456 | |
| 1457 | if (data[IFLA_IPTUN_TTL]) { |
| 1458 | parms->iph.ttl = nla_get_u8(data[IFLA_IPTUN_TTL]); |
| 1459 | if (parms->iph.ttl) |
| 1460 | parms->iph.frag_off = htons(IP_DF); |
| 1461 | } |
| 1462 | |
| 1463 | if (data[IFLA_IPTUN_TOS]) |
| 1464 | parms->iph.tos = nla_get_u8(data[IFLA_IPTUN_TOS]); |
| 1465 | |
| 1466 | if (!data[IFLA_IPTUN_PMTUDISC] || nla_get_u8(data[IFLA_IPTUN_PMTUDISC])) |
| 1467 | parms->iph.frag_off = htons(IP_DF); |
| 1468 | |
| 1469 | if (data[IFLA_IPTUN_FLAGS]) |
Nicolas Dichtel | d440b72 | 2012-11-15 04:06:41 +0000 | [diff] [blame] | 1470 | parms->i_flags = nla_get_be16(data[IFLA_IPTUN_FLAGS]); |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1471 | |
| 1472 | if (data[IFLA_IPTUN_PROTO]) |
| 1473 | parms->iph.protocol = nla_get_u8(data[IFLA_IPTUN_PROTO]); |
| 1474 | |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1475 | } |
| 1476 | |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1477 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1478 | /* This function returns true when 6RD attributes are present in the nl msg */ |
| 1479 | static bool ipip6_netlink_6rd_parms(struct nlattr *data[], |
| 1480 | struct ip_tunnel_6rd *ip6rd) |
| 1481 | { |
| 1482 | bool ret = false; |
| 1483 | memset(ip6rd, 0, sizeof(*ip6rd)); |
| 1484 | |
| 1485 | if (!data) |
| 1486 | return ret; |
| 1487 | |
| 1488 | if (data[IFLA_IPTUN_6RD_PREFIX]) { |
| 1489 | ret = true; |
| 1490 | nla_memcpy(&ip6rd->prefix, data[IFLA_IPTUN_6RD_PREFIX], |
| 1491 | sizeof(struct in6_addr)); |
| 1492 | } |
| 1493 | |
| 1494 | if (data[IFLA_IPTUN_6RD_RELAY_PREFIX]) { |
| 1495 | ret = true; |
| 1496 | ip6rd->relay_prefix = |
| 1497 | nla_get_be32(data[IFLA_IPTUN_6RD_RELAY_PREFIX]); |
| 1498 | } |
| 1499 | |
| 1500 | if (data[IFLA_IPTUN_6RD_PREFIXLEN]) { |
| 1501 | ret = true; |
| 1502 | ip6rd->prefixlen = nla_get_u16(data[IFLA_IPTUN_6RD_PREFIXLEN]); |
| 1503 | } |
| 1504 | |
| 1505 | if (data[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]) { |
| 1506 | ret = true; |
| 1507 | ip6rd->relay_prefixlen = |
| 1508 | nla_get_u16(data[IFLA_IPTUN_6RD_RELAY_PREFIXLEN]); |
| 1509 | } |
| 1510 | |
| 1511 | return ret; |
| 1512 | } |
| 1513 | #endif |
| 1514 | |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1515 | static int ipip6_newlink(struct net *src_net, struct net_device *dev, |
| 1516 | struct nlattr *tb[], struct nlattr *data[]) |
| 1517 | { |
| 1518 | struct net *net = dev_net(dev); |
| 1519 | struct ip_tunnel *nt; |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1520 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1521 | struct ip_tunnel_6rd ip6rd; |
| 1522 | #endif |
| 1523 | int err; |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1524 | |
| 1525 | nt = netdev_priv(dev); |
| 1526 | ipip6_netlink_parms(data, &nt->parms); |
| 1527 | |
| 1528 | if (ipip6_tunnel_locate(net, &nt->parms, 0)) |
| 1529 | return -EEXIST; |
| 1530 | |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1531 | err = ipip6_tunnel_create(dev); |
| 1532 | if (err < 0) |
| 1533 | return err; |
| 1534 | |
| 1535 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1536 | if (ipip6_netlink_6rd_parms(data, &ip6rd)) |
| 1537 | err = ipip6_tunnel_update_6rd(nt, &ip6rd); |
| 1538 | #endif |
| 1539 | |
| 1540 | return err; |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1541 | } |
| 1542 | |
| 1543 | static int ipip6_changelink(struct net_device *dev, struct nlattr *tb[], |
| 1544 | struct nlattr *data[]) |
| 1545 | { |
Nicolas Dichtel | 86bd68b | 2013-07-03 17:00:34 +0200 | [diff] [blame] | 1546 | struct ip_tunnel *t = netdev_priv(dev); |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1547 | struct ip_tunnel_parm p; |
Nicolas Dichtel | 86bd68b | 2013-07-03 17:00:34 +0200 | [diff] [blame] | 1548 | struct net *net = t->net; |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1549 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1550 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1551 | struct ip_tunnel_6rd ip6rd; |
| 1552 | #endif |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1553 | |
| 1554 | if (dev == sitn->fb_tunnel_dev) |
| 1555 | return -EINVAL; |
| 1556 | |
| 1557 | ipip6_netlink_parms(data, &p); |
| 1558 | |
| 1559 | if (((dev->flags & IFF_POINTOPOINT) && !p.iph.daddr) || |
| 1560 | (!(dev->flags & IFF_POINTOPOINT) && p.iph.daddr)) |
| 1561 | return -EINVAL; |
| 1562 | |
| 1563 | t = ipip6_tunnel_locate(net, &p, 0); |
| 1564 | |
| 1565 | if (t) { |
| 1566 | if (t->dev != dev) |
| 1567 | return -EEXIST; |
| 1568 | } else |
| 1569 | t = netdev_priv(dev); |
| 1570 | |
| 1571 | ipip6_tunnel_update(t, &p); |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1572 | |
| 1573 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1574 | if (ipip6_netlink_6rd_parms(data, &ip6rd)) |
| 1575 | return ipip6_tunnel_update_6rd(t, &ip6rd); |
| 1576 | #endif |
| 1577 | |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1578 | return 0; |
| 1579 | } |
| 1580 | |
Nicolas Dichtel | e4c94a9 | 2012-11-14 05:14:06 +0000 | [diff] [blame] | 1581 | static size_t ipip6_get_size(const struct net_device *dev) |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1582 | { |
| 1583 | return |
| 1584 | /* IFLA_IPTUN_LINK */ |
| 1585 | nla_total_size(4) + |
| 1586 | /* IFLA_IPTUN_LOCAL */ |
| 1587 | nla_total_size(4) + |
| 1588 | /* IFLA_IPTUN_REMOTE */ |
| 1589 | nla_total_size(4) + |
| 1590 | /* IFLA_IPTUN_TTL */ |
| 1591 | nla_total_size(1) + |
| 1592 | /* IFLA_IPTUN_TOS */ |
| 1593 | nla_total_size(1) + |
Nicolas Dichtel | a12c9a8 | 2012-11-14 05:14:05 +0000 | [diff] [blame] | 1594 | /* IFLA_IPTUN_PMTUDISC */ |
| 1595 | nla_total_size(1) + |
| 1596 | /* IFLA_IPTUN_FLAGS */ |
| 1597 | nla_total_size(2) + |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1598 | /* IFLA_IPTUN_PROTO */ |
| 1599 | nla_total_size(1) + |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1600 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1601 | /* IFLA_IPTUN_6RD_PREFIX */ |
| 1602 | nla_total_size(sizeof(struct in6_addr)) + |
| 1603 | /* IFLA_IPTUN_6RD_RELAY_PREFIX */ |
| 1604 | nla_total_size(4) + |
| 1605 | /* IFLA_IPTUN_6RD_PREFIXLEN */ |
| 1606 | nla_total_size(2) + |
| 1607 | /* IFLA_IPTUN_6RD_RELAY_PREFIXLEN */ |
| 1608 | nla_total_size(2) + |
| 1609 | #endif |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1610 | 0; |
| 1611 | } |
| 1612 | |
Nicolas Dichtel | e4c94a9 | 2012-11-14 05:14:06 +0000 | [diff] [blame] | 1613 | static int ipip6_fill_info(struct sk_buff *skb, const struct net_device *dev) |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1614 | { |
| 1615 | struct ip_tunnel *tunnel = netdev_priv(dev); |
| 1616 | struct ip_tunnel_parm *parm = &tunnel->parms; |
| 1617 | |
| 1618 | if (nla_put_u32(skb, IFLA_IPTUN_LINK, parm->link) || |
| 1619 | nla_put_be32(skb, IFLA_IPTUN_LOCAL, parm->iph.saddr) || |
| 1620 | nla_put_be32(skb, IFLA_IPTUN_REMOTE, parm->iph.daddr) || |
| 1621 | nla_put_u8(skb, IFLA_IPTUN_TTL, parm->iph.ttl) || |
Nicolas Dichtel | a12c9a8 | 2012-11-14 05:14:05 +0000 | [diff] [blame] | 1622 | nla_put_u8(skb, IFLA_IPTUN_TOS, parm->iph.tos) || |
| 1623 | nla_put_u8(skb, IFLA_IPTUN_PMTUDISC, |
| 1624 | !!(parm->iph.frag_off & htons(IP_DF))) || |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1625 | nla_put_u8(skb, IFLA_IPTUN_PROTO, parm->iph.protocol) || |
Nicolas Dichtel | d440b72 | 2012-11-15 04:06:41 +0000 | [diff] [blame] | 1626 | nla_put_be16(skb, IFLA_IPTUN_FLAGS, parm->i_flags)) |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1627 | goto nla_put_failure; |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1628 | |
| 1629 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1630 | if (nla_put(skb, IFLA_IPTUN_6RD_PREFIX, sizeof(struct in6_addr), |
| 1631 | &tunnel->ip6rd.prefix) || |
| 1632 | nla_put_be32(skb, IFLA_IPTUN_6RD_RELAY_PREFIX, |
| 1633 | tunnel->ip6rd.relay_prefix) || |
| 1634 | nla_put_u16(skb, IFLA_IPTUN_6RD_PREFIXLEN, |
| 1635 | tunnel->ip6rd.prefixlen) || |
| 1636 | nla_put_u16(skb, IFLA_IPTUN_6RD_RELAY_PREFIXLEN, |
| 1637 | tunnel->ip6rd.relay_prefixlen)) |
| 1638 | goto nla_put_failure; |
| 1639 | #endif |
| 1640 | |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1641 | return 0; |
| 1642 | |
| 1643 | nla_put_failure: |
| 1644 | return -EMSGSIZE; |
| 1645 | } |
| 1646 | |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1647 | static const struct nla_policy ipip6_policy[IFLA_IPTUN_MAX + 1] = { |
| 1648 | [IFLA_IPTUN_LINK] = { .type = NLA_U32 }, |
| 1649 | [IFLA_IPTUN_LOCAL] = { .type = NLA_U32 }, |
| 1650 | [IFLA_IPTUN_REMOTE] = { .type = NLA_U32 }, |
| 1651 | [IFLA_IPTUN_TTL] = { .type = NLA_U8 }, |
| 1652 | [IFLA_IPTUN_TOS] = { .type = NLA_U8 }, |
| 1653 | [IFLA_IPTUN_PMTUDISC] = { .type = NLA_U8 }, |
| 1654 | [IFLA_IPTUN_FLAGS] = { .type = NLA_U16 }, |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1655 | [IFLA_IPTUN_PROTO] = { .type = NLA_U8 }, |
Nicolas Dichtel | e2f1f07 | 2012-11-19 22:41:45 +0000 | [diff] [blame] | 1656 | #ifdef CONFIG_IPV6_SIT_6RD |
| 1657 | [IFLA_IPTUN_6RD_PREFIX] = { .len = sizeof(struct in6_addr) }, |
| 1658 | [IFLA_IPTUN_6RD_RELAY_PREFIX] = { .type = NLA_U32 }, |
| 1659 | [IFLA_IPTUN_6RD_PREFIXLEN] = { .type = NLA_U16 }, |
| 1660 | [IFLA_IPTUN_6RD_RELAY_PREFIXLEN] = { .type = NLA_U16 }, |
| 1661 | #endif |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1662 | }; |
| 1663 | |
Willem de Bruijn | 9434266 | 2013-11-13 21:27:38 -0500 | [diff] [blame] | 1664 | static void ipip6_dellink(struct net_device *dev, struct list_head *head) |
| 1665 | { |
| 1666 | struct net *net = dev_net(dev); |
| 1667 | struct sit_net *sitn = net_generic(net, sit_net_id); |
| 1668 | |
| 1669 | if (dev != sitn->fb_tunnel_dev) |
| 1670 | unregister_netdevice_queue(dev, head); |
| 1671 | } |
| 1672 | |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1673 | static struct rtnl_link_ops sit_link_ops __read_mostly = { |
| 1674 | .kind = "sit", |
| 1675 | .maxtype = IFLA_IPTUN_MAX, |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1676 | .policy = ipip6_policy, |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1677 | .priv_size = sizeof(struct ip_tunnel), |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1678 | .setup = ipip6_tunnel_setup, |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1679 | .validate = ipip6_validate, |
Nicolas Dichtel | f372341 | 2012-11-14 05:14:07 +0000 | [diff] [blame] | 1680 | .newlink = ipip6_newlink, |
| 1681 | .changelink = ipip6_changelink, |
Nicolas Dichtel | e4c94a9 | 2012-11-14 05:14:06 +0000 | [diff] [blame] | 1682 | .get_size = ipip6_get_size, |
| 1683 | .fill_info = ipip6_fill_info, |
Willem de Bruijn | 9434266 | 2013-11-13 21:27:38 -0500 | [diff] [blame] | 1684 | .dellink = ipip6_dellink, |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1685 | }; |
| 1686 | |
Eric Dumazet | 6dcd814 | 2010-08-30 07:04:14 +0000 | [diff] [blame] | 1687 | static struct xfrm_tunnel sit_handler __read_mostly = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | .handler = ipip6_rcv, |
| 1689 | .err_handler = ipip6_err, |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 1690 | .priority = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | }; |
| 1692 | |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1693 | static struct xfrm_tunnel ipip_handler __read_mostly = { |
| 1694 | .handler = ipip_rcv, |
| 1695 | .err_handler = ipip6_err, |
| 1696 | .priority = 2, |
| 1697 | }; |
| 1698 | |
Willem de Bruijn | 9434266 | 2013-11-13 21:27:38 -0500 | [diff] [blame] | 1699 | static void __net_exit sit_destroy_tunnels(struct net *net, |
| 1700 | struct list_head *head) |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1701 | { |
Willem de Bruijn | 9434266 | 2013-11-13 21:27:38 -0500 | [diff] [blame] | 1702 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1703 | struct net_device *dev, *aux; |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1704 | int prio; |
| 1705 | |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1706 | for_each_netdev_safe(net, dev, aux) |
| 1707 | if (dev->rtnl_link_ops == &sit_link_ops) |
| 1708 | unregister_netdevice_queue(dev, head); |
| 1709 | |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1710 | for (prio = 1; prio < 4; prio++) { |
| 1711 | int h; |
| 1712 | for (h = 0; h < HASH_SIZE; h++) { |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 1713 | struct ip_tunnel *t; |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1714 | |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 1715 | t = rtnl_dereference(sitn->tunnels[prio][h]); |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1716 | while (t != NULL) { |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1717 | /* If dev is in the same netns, it has already |
| 1718 | * been added to the list by the previous loop. |
| 1719 | */ |
Nicolas Dichtel | fc8f999 | 2013-08-13 17:51:10 +0200 | [diff] [blame] | 1720 | if (!net_eq(dev_net(t->dev), net)) |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1721 | unregister_netdevice_queue(t->dev, |
| 1722 | head); |
Eric Dumazet | 753ea8e | 2011-01-20 07:16:24 +0000 | [diff] [blame] | 1723 | t = rtnl_dereference(t->next); |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1724 | } |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1725 | } |
| 1726 | } |
| 1727 | } |
| 1728 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1729 | static int __net_init sit_init_net(struct net *net) |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1730 | { |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1731 | struct sit_net *sitn = net_generic(net, sit_net_id); |
Ted Feng | 72b3601 | 2011-12-08 00:46:21 +0000 | [diff] [blame] | 1732 | struct ip_tunnel *t; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1733 | int err; |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1734 | |
Pavel Emelyanov | 2918217 | 2008-04-16 01:16:38 -0700 | [diff] [blame] | 1735 | sitn->tunnels[0] = sitn->tunnels_wc; |
| 1736 | sitn->tunnels[1] = sitn->tunnels_l; |
| 1737 | sitn->tunnels[2] = sitn->tunnels_r; |
| 1738 | sitn->tunnels[3] = sitn->tunnels_r_l; |
| 1739 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1740 | sitn->fb_tunnel_dev = alloc_netdev(sizeof(struct ip_tunnel), "sit0", |
| 1741 | ipip6_tunnel_setup); |
| 1742 | if (!sitn->fb_tunnel_dev) { |
| 1743 | err = -ENOMEM; |
| 1744 | goto err_alloc_dev; |
| 1745 | } |
Alexey Dobriyan | be77e59 | 2008-11-23 17:26:26 -0800 | [diff] [blame] | 1746 | dev_net_set(sitn->fb_tunnel_dev, net); |
Nicolas Dichtel | 205983c | 2013-10-01 18:04:59 +0200 | [diff] [blame] | 1747 | sitn->fb_tunnel_dev->rtnl_link_ops = &sit_link_ops; |
Nicolas Dichtel | 5e6700b | 2013-06-26 16:11:28 +0200 | [diff] [blame] | 1748 | /* FB netdevice is special: we have one, and only one per netns. |
| 1749 | * Allowing to move it to another netns is clearly unsafe. |
| 1750 | */ |
| 1751 | sitn->fb_tunnel_dev->features |= NETIF_F_NETNS_LOCAL; |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1752 | |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1753 | err = ipip6_fb_tunnel_init(sitn->fb_tunnel_dev); |
| 1754 | if (err) |
| 1755 | goto err_dev_free; |
| 1756 | |
YOSHIFUJI Hideaki / 吉藤英明 | e0c9394 | 2009-10-11 03:31:34 +0000 | [diff] [blame] | 1757 | ipip6_tunnel_clone_6rd(sitn->fb_tunnel_dev, sitn); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1758 | |
| 1759 | if ((err = register_netdev(sitn->fb_tunnel_dev))) |
| 1760 | goto err_reg_dev; |
| 1761 | |
Ted Feng | 72b3601 | 2011-12-08 00:46:21 +0000 | [diff] [blame] | 1762 | t = netdev_priv(sitn->fb_tunnel_dev); |
| 1763 | |
| 1764 | strcpy(t->parms.name, sitn->fb_tunnel_dev->name); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1765 | return 0; |
| 1766 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1767 | err_reg_dev: |
Stephen Hemminger | 1326c3d | 2008-11-20 20:33:56 -0800 | [diff] [blame] | 1768 | dev_put(sitn->fb_tunnel_dev); |
Eric Dumazet | dd4080e | 2010-09-28 02:17:58 +0000 | [diff] [blame] | 1769 | err_dev_free: |
| 1770 | ipip6_dev_free(sitn->fb_tunnel_dev); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1771 | err_alloc_dev: |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1772 | return err; |
| 1773 | } |
| 1774 | |
Alexey Dobriyan | 2c8c1e7 | 2010-01-17 03:35:32 +0000 | [diff] [blame] | 1775 | static void __net_exit sit_exit_net(struct net *net) |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1776 | { |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1777 | LIST_HEAD(list); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1778 | |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1779 | rtnl_lock(); |
Willem de Bruijn | 9434266 | 2013-11-13 21:27:38 -0500 | [diff] [blame] | 1780 | sit_destroy_tunnels(net, &list); |
Eric Dumazet | 62808f9 | 2009-10-28 04:37:43 +0000 | [diff] [blame] | 1781 | unregister_netdevice_many(&list); |
Pavel Emelyanov | cd3dbc1 | 2008-04-16 01:16:18 -0700 | [diff] [blame] | 1782 | rtnl_unlock(); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1783 | } |
| 1784 | |
| 1785 | static struct pernet_operations sit_net_ops = { |
| 1786 | .init = sit_init_net, |
| 1787 | .exit = sit_exit_net, |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1788 | .id = &sit_net_id, |
| 1789 | .size = sizeof(struct sit_net), |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1790 | }; |
| 1791 | |
Adrian Bunk | 89c8945 | 2006-11-20 16:56:48 -0800 | [diff] [blame] | 1792 | static void __exit sit_cleanup(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | { |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1794 | rtnl_link_unregister(&sit_link_ops); |
Kazunori MIYAZAWA | c73cb5a | 2007-02-13 12:55:25 -0800 | [diff] [blame] | 1795 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1796 | xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
Alexey Kuznetsov | db44575 | 2005-07-30 17:46:44 -0700 | [diff] [blame] | 1797 | |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1798 | unregister_pernet_device(&sit_net_ops); |
Eric Dumazet | ef9a9d1 | 2009-10-23 17:51:26 +0000 | [diff] [blame] | 1799 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1800 | } |
| 1801 | |
Adrian Bunk | 89c8945 | 2006-11-20 16:56:48 -0800 | [diff] [blame] | 1802 | static int __init sit_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | { |
| 1804 | int err; |
| 1805 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 1806 | pr_info("IPv6 over IPv4 tunneling driver\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | |
Eric W. Biederman | 6710117 | 2009-11-29 15:46:16 +0000 | [diff] [blame] | 1808 | err = register_pernet_device(&sit_net_ops); |
Pavel Emelyanov | 8190d90 | 2008-04-16 01:15:17 -0700 | [diff] [blame] | 1809 | if (err < 0) |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 1810 | return err; |
| 1811 | err = xfrm4_tunnel_register(&sit_handler, AF_INET6); |
| 1812 | if (err < 0) { |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1813 | pr_info("%s: can't register ip6ip4\n", __func__); |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1814 | goto xfrm_tunnel_failed; |
Alexey Dobriyan | d5aa407 | 2010-02-16 09:05:04 +0000 | [diff] [blame] | 1815 | } |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1816 | err = xfrm4_tunnel_register(&ipip_handler, AF_INET); |
| 1817 | if (err < 0) { |
| 1818 | pr_info("%s: can't register ip4ip4\n", __func__); |
| 1819 | goto xfrm_tunnel4_failed; |
| 1820 | } |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1821 | err = rtnl_link_register(&sit_link_ops); |
| 1822 | if (err < 0) |
| 1823 | goto rtnl_link_failed; |
| 1824 | |
| 1825 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | return err; |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1827 | |
| 1828 | rtnl_link_failed: |
Nicolas Dichtel | 32b8a8e | 2013-05-27 23:48:16 +0000 | [diff] [blame] | 1829 | xfrm4_tunnel_deregister(&ipip_handler, AF_INET); |
| 1830 | xfrm_tunnel4_failed: |
Nicolas Dichtel | ba3e3f5 | 2012-11-09 06:10:00 +0000 | [diff] [blame] | 1831 | xfrm4_tunnel_deregister(&sit_handler, AF_INET6); |
| 1832 | xfrm_tunnel_failed: |
| 1833 | unregister_pernet_device(&sit_net_ops); |
| 1834 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | } |
Joerg Roedel | 989e5b9 | 2006-10-10 14:47:44 -0700 | [diff] [blame] | 1836 | |
| 1837 | module_init(sit_init); |
| 1838 | module_exit(sit_cleanup); |
Jan Dittmer | 39c8508 | 2006-10-13 15:05:53 -0700 | [diff] [blame] | 1839 | MODULE_LICENSE("GPL"); |
Vasiliy Kulikov | 8909c9a | 2011-03-02 00:33:13 +0300 | [diff] [blame] | 1840 | MODULE_ALIAS_NETDEV("sit0"); |